From: Frank Rowand <frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Grant Likely
<grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>,
David Gibson
<david-xT8FGy+AXnRB3Ne2BGzF6laj5H9X9Tb+@public.gmane.org>,
"devicetree-spec-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-spec-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: case sensitivity for devicetree node names
Date: Fri, 10 Jun 2016 13:05:24 -0700 [thread overview]
Message-ID: <575B1D84.2010703@gmail.com> (raw)
I had assumed that devicetree node names were case sensitive. But a recent
email thread asserted that they were not, which made me curious.
dtc treats node names as case sensitive:
$ cat test_node_case_1.dts
/dts-v1/;
/ {
node-x {
prop_a = < 1 >;
};
};
/ {
node-X {
prop_a = < 2 >;
};
};
$ cat test_node_case_2.dts
/dts-v1/;
/ {
node-x {
prop_a = < 1 >;
};
};
/ {
node-x {
prop_a = < 2 >;
};
};
$ dtc -O dts test_node_case_1.dts
/dts-v1/;
/ {
node-x {
prop_a = <0x1>;
};
node-X {
prop_a = <0x2>;
};
};
$ dtc -O dts test_node_case_2.dts
/dts-v1/;
/ {
node-x {
prop_a = <0x2>;
};
};
But the Linux kernel source code defines of_node_cmp() as:
include/linux/of.h:
/* Default string compare functions, Allow arch asm/prom.h to override */
#if !defined(of_compat_cmp)
#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
arch/sparc/include/asm/prom.h uses strcmp() instead of strcasecmp().
Examples of using of_node_cmp() to check for a node name can be found,
for example, of_find_node_by_name().
Is case insensitivity for node names a bug in the Linux kernel, or desired
for some reason?
-Frank
next reply other threads:[~2016-06-10 20:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-10 20:05 Frank Rowand [this message]
[not found] ` <575B1D84.2010703-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-06-10 21:38 ` case sensitivity for devicetree node names Rob Herring
[not found] ` <CAL_JsqKw8dVp5y487fo6_mwZfeN6ww8HiYnsudnB8afBrv2oMQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-06-10 22:02 ` Frank Rowand
2016-06-11 19:38 ` Frank Rowand
[not found] ` <575C68A1.1020701-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-06-11 22:05 ` Benjamin Herrenschmidt
[not found] ` <1465682743.19533.18.camel-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
2016-06-12 18:39 ` Frank Rowand
[not found] ` <575DAC69.5010804-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-06-12 21:56 ` Benjamin Herrenschmidt
2016-06-14 1:10 ` David Gibson
[not found] ` <20160614011021.GD4882-RXTfZT5YzpxwFLYp8hBm2A@public.gmane.org>
2016-06-14 3:53 ` Frank Rowand
[not found] ` <575F7FC1.5040508-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-06-14 5:10 ` David Gibson
[not found] ` <20160614051028.GL4882-RXTfZT5YzpxwFLYp8hBm2A@public.gmane.org>
2016-06-14 5:29 ` Frank Rowand
[not found] ` <575F963F.8090105-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-06-14 6:05 ` David Gibson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=575B1D84.2010703@gmail.com \
--to=frowand.list-re5jqeeqqe8avxtiumwx3w@public.gmane.org \
--cc=david-xT8FGy+AXnRB3Ne2BGzF6laj5H9X9Tb+@public.gmane.org \
--cc=devicetree-spec-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org \
--cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).